Turns out that his father & grandfather had gotten a wives, respectively, 36 & 30 years their junior.
en.wikipedia.org
Getting a wife that much younger is always going to be impressive. Their 19th Century and early 20th Century seduction methods won't have that much applicability now.
Harrison Ruffin Tyler was unable to get such an age gap in his relationship.
Being the grandson of a former president is a status flex. I don't see much evidence that being the grandson of a former president helps drop panties.
Among recent former US Presidents with grandchildren, George W. Bush and Bill Clinton have grandsons that haven't reached puberty yet. We have no idea if they will be good at seduction.
One of George HW Bush's grandsons is George P. Bush (son of Jeb Bush). George P. Bush made People's Magazine's Most Eligible Bachelors List in 2000 and got married in 2004 (remains married today).
Jimmy Carter has a few grandsons. Jason Carter is a state senator in Georgia who has been married in 2000. None of Jimmy Carter's grandsons have the look of a red pilled, alpha or sigma male who has a high notch count. However, it is possible. I think it would be known if a presidential grandson seduced numerous women.
Joe Biden has a grandson who was born in 2006. Little is known about him.
Christian Ford (a grandson of Gerald Ford) might be a potential top tier guy who is good at seduction. He is 27 right now and was a college lacrosse player.